Activity Doesn't Care about Years?

I’ve noticed that when viewing the thread list, the “Activity” column seems to not take the year into account when determining how recent something is. For example, there is a thread that was last updated on September 27, 2014, yet shows up at the top of the list as updated 2 days ago. It’s kind of like the Y2K problem, except even worse!

Thanks! reported:

https://meta.discourse.org/t/possible-bug-with-activity-dates/34024